Respiration‚ digestion and rocks Respiration Respiration is a chemical reaction that happens in all living cells. It is the way that energy is released from glucose‚ for our cells to use to keep us functioning. Remember that respiration is not the same as breathing (which is properly called ventilation). The glucose and oxygen react together in the cells to produce carbon dioxide and water. The reaction is called aerobic respiration because oxygen from the air is needed for it to work. Digestion
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mechanical and chemical digestion. (a) Ingestion (b) Digestion (c) Absorption (d) Assimilation (e) Egestion TASK 3: The process of digestion involves mechanical and chemical digestion along with the process of: 1. Ingestion 2. Digestion 3. Absorption 4. Assimilation 5. Egestion Using either a starch molecule or a fat molecule explain the journey from the mouth to the anus and indicate clearly points at which mechanical and chemical digestion are taking place:
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optimum pH at which it is most active. An increase or decrease in the pH of the solution will cause the enzyme to have a change in its three dimensional shape. If an enzyme is placed in an environment that is to basic or acidic the reaction will take longer to digest the starch because the enzyme shape has changed and the substrate will have a harder time connecting to the active
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2 Y Nutrition in Animals food into simpler substances is called digestion. You have studied in Class VI that food consists of many components. Try to recall and list them below: 1. ______________________ 2. ______________________ 3. ______________________ 4. ______________________ 5. ______________________ 6. ______________________ no t The components of food such as carbohydrates are complex substances. These complex substances cannot be utilised as such. So they are broken down into
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Title: Starch Aims 1. To identify starch in food. 2. To study the microscopic appearances of raw and heated starch. 3. To compare the viscosity of various gelatinized starch solutions. Introduction Starch is one of the most abundant substances on the earth. It can be found in seeds‚ grains‚ and roots of many crops where it is synthesized in granular form. Starch granules are packages of starch molecules. The importance of starch is well-known‚ as is its central role in human diet.
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Cited: Dijkstra J. 2005: Quantitative Aspects of Ruminant Digestion and Metabolism (2nd Edition). CABI Publishing. Wallingford. Brooker‚ R.J.‚ Widmaier‚ E.P.‚ Graham L.E. & Stiling P.D. 2008: Biology. McGraw-Hill. New York.. Church‚ D. C. ed. 1993. The Ruminant Animal Digestive Physiology and Nutrition. Waveland
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activity of the enzyme catecholase in different pH levels as well as its absorbance in differently concentrated solutions. A spetrophotometer was used to measure the absorbance of the enzyme catecholase in different pH solutions as well as to measure the absorbance of catecholase in solutions with different concentrations of potato juice and phosphate buffers. Absorbance of the enzyme catecholase was at an optimum level when pH was close to neutral. When pH was acidic or basic‚ the catecholase was less
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Enzyme Activators and Inhibitors Lucia House AP Biology‚ Block 4 Mr. Trice October 18‚ 2012 Introduction: Metabolism is the totality of all of an organism’s chemical reactions. Chemical reactions occur due to enzymes‚ a substance which acts as a catalyst in driving chemical reactions in order to produce a desired product (Campbell and Reece‚ 2002). A catalyst is usually a protein; however‚ some catalytic molecules counter this generalization. A discovery made in the early nineteen- nineties
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Determination of the Effect of pH on Amylase Activity Grace Chung Abstract: Amylase is an important enzyme in the human body as it allows for the consumption of starch by breaking the polysaccharide down into maltose units. All enzymes‚ including amylase‚ function best at a certain optimal pH. Therefore‚ in this experiment‚ the effect of different pHs on the reaction rate of amylase is studied. It was hypothesized that the amylase-starch reaction would proceed fastest at a pH closest to that of
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Digestion is a process in which the food that we eat is broken down into tiny nutrients to be taken in by the body. Within the human digestive system‚ chemical and physical reactions occur that allow for the digestion and the absorption of proteins into the bloodstream. The purpose of this paper is to show how chemistry relates to the daily functions within the body. There are two types of digestion processes‚ which are called mechanical and chemical digestion. Mechanical digestion includes the
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